What is the meaning of crawfish?

noun

• Tiny lobster-like crustaceans usually boiled briefly.
  • synonyms: crayfish, crawdad, ecrevisse
• Small freshwater decapod crustacean that resembles a lobster.
  • synonyms: crayfish, crawdad, crawdaddy
• Large edible marine crustacean having a spiny carapace but lacking the large pincers of true lobsters.
  • synonyms: spiny lobster, langouste, rock lobster, crayfish, sea crawfish

verb

• Make a retreat from an earlier commitment or activity.
  • usage: "We'll have to crawfish out from meeting with him"; "He backed out of his earlier promise"; "The aggressive investment company pulled in its horns"
  • synonyms: retreat, pull back, back out, back away, crawfish out, pull in one's horns, withdraw